UPDATE – 3/5/8.. PHP speedy is now a plugin. Gotta say, it mucked up things for me. I don’t feel like doing anymore troubleshooting, but I would NOT recommend it. I may try eAccelerator.
PHP Speedy is a pretty cool PHP optimizer/compressor. It compresses your data before sending it over the interweb. You need to download the files from the link at the start of this article, put those files in your web root, run a quick setup and then….
Add this to the very top of your index.php (your path will vary:)
Add this to the very bottom
I added it to my main theme, and it’s very snappy. When I added it to my iPhone optimized page, it made a HUGE difference.